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Finding the Fourth Proportional to 13,695.84, 18,900.18 and 7,408.26

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Solution

The fourth proportional to 13,695.84, 18,900.18 and 7,408.26 is: 10,223.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.84 : 18,900.18 = 7,408.26 : x
  2. Step 2: Convert to fraction form
    13,695.84/18,900.18 = 7,408.26/x
  3. Step 3: Cross multiply
    13,695.84x = 18,900.18 × 7,408.26
  4. Step 4: Simplify right side
    13,695.84x = 140,017,447.49
  5. Step 5: Solve for x
    x = 140,017,447.49/13,695.84
  6. Step 6: Final answer
    x = 10,223.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.